Wireless sensor nodes collecting surrounding environment information in the IoT environment operate in a low duty cycle mode to save energy and communicate with neighboring nodes. The low duty cycle mode keeps the wireless interface turned off and minimizes energy consumption, resulting in a large delay in event detection and data transmission of wireless sensor nodes. Thus, an important event cannot be detected in a specific time period and transmitted to the sink node at a required time. In

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... is paper, we devise a technique that can minimize event detection and data dissemination delay in a low duty cycle environment. By adjusting the activation status of nodes sensing both the same area and the adjacent area, it guarantees fast data transmission from the event detection point to the sink node. The dissemination delay performance is improved by configuring the environment so that an equal number of nodes exist in the active state in the same sensing area. In the simulation conducted for performance verification, it is confirmed that the activation slots are designated more evenly than when the nodes arbitrarily designated the activation slots, and thus the overall transmission delay is reduced.